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3 years ago

Solve by completing the square x^2-6x-16=0

Mathematics

2 answers:

Greeley [361]3 years ago

7 0

Answer:

x = 8 or

x = -2

Step-by-step explanation:

<h2><em>Completing The Square</em><em>:</em></h2>

x² - 6x - 16 = 0

Here,

a = 1

b = -6

c = -16

Now,

x² - 6x + [6/2(1)]² - [6/2(1)]² - 16 = 0

x² - 6x + (6/2)² - (6/2)² - 16 = 0

x² - 6x + (3)² - (3)² - 16 = 0

(x - 3)² - 9 - 16 = 0

(x - 3)² - 25 = 0

(x - 3)² = 25

x - 3 = +-√25

x - 3 = +- 5

x = 3 +- 5

x = 3 + 5 or x = 3 - 5

<em><u>x = 8 or x = -2</u></em>

Hope it's helpful

Elan Coil [88]3 years ago

3 0

Answer:

Step-by-step explanation:

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3 years ago

Read 2 more answers

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lara [203]

Can't factor
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3 years ago

What is the X for this 7x+12=26

lukranit [14]

Answer:

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Step-by-step explanation:

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3 years ago

Use the distributive property to write an expression that is equivalent to 9(c+5).

shepuryov [24]

Answer:

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Step-by-step explanation:

The distributive property also known as distributive law of multiplication and division.

In the given expression, distributive law of multiplication is applied where we can multiply first before addition.

Given

9(c+5)

Using distributive property

9(c+5)

= (9 × c) + (9 × 5)

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2 years ago

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Pepsi [2]

Answer: 8.69 (read explanation)

Step-by-step explanation:

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3 years ago